[PATCH v3 3/4] dt-bindings: reserved-memory: Make DMA-BUF CMA heap DT-configurable
From: Minchan Kim <minchan@kernel.org>
Date: 2021-01-13 01:23:25
Also in:
linux-devicetree, linux-media, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Hyesoo Yu <redacted> Document devicetree binding for chunk cma heap on dma heap framework. The DMA chunk heap supports the bulk allocation of higher order pages. Signed-off-by: Hyesoo Yu <redacted> Signed-off-by: Minchan Kim <minchan@kernel.org> Signed-off-by: Hridya Valsaraju <redacted> Change-Id: I8fb231e5a8360e2d8f65947e155b12aa664dde01 --- .../reserved-memory/dma_heap_chunk.yaml | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/dma_heap_chunk.yaml
diff --git a/Documentation/devicetree/bindings/reserved-memory/dma_heap_chunk.yaml b/Documentation/devicetree/bindings/reserved-memory/dma_heap_chunk.yaml
new file mode 100644
index 000000000000..3e7fed5fb006
--- /dev/null
+++ b/Documentation/devicetree/bindings/reserved-memory/dma_heap_chunk.yaml@@ -0,0 +1,58 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/reserved-memory/dma_heap_chunk.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Device tree binding for chunk heap on DMA HEAP FRAMEWORK + +description: | + The DMA chunk heap is backed by the Contiguous Memory Allocator (CMA) and + supports bulk allocation of fixed size pages. + +maintainers: + - Hyesoo Yu <hyesoo.yu@samsung.com> + - John Stultz <john.stultz@linaro.org> + - Minchan Kim <minchan@kernel.org> + - Hridya Valsaraju<hridya@google.com> + + +properties: + compatible: + enum: + - dma_heap,chunk + + chunk-order: + description: | + order of pages that will get allocated from the chunk DMA heap. + maxItems: 1 + + size: + maxItems: 1 + + alignment: + maxItems: 1 + +required: + - compatible + - size + - alignment + - chunk-order + +additionalProperties: false + +examples: + - | + reserved-memory { + #address-cells = <2>; + #size-cells = <1>; + + chunk_memory: chunk_memory { + compatible = "dma_heap,chunk"; + size = <0x3000000>; + alignment = <0x0 0x00010000>; + chunk-order = <4>; + }; + }; + +
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2.30.0.284.gd98b1dd5eaa7-goog